package com.liangjiange.listener;

import java.util.ArrayList;

public class WeatherData implements Subject{
	
	private ArrayList<Observer> observers;
	
	private float temparature;
	
	private float humidity;
	
	private float pressure;
	
	public WeatherData(){
		observers = new ArrayList<Observer>();
	}

	@Override
	public void registerObserver(Observer o) {
		observers.add(o);
		
	}

	@Override
	public void removeObserver(Observer o) {
		int i = observers.indexOf(o);
		if(i>=0){
			observers.remove(i);
		}
		
	}

	@Override
	public void notifyObservers() {
		for(int i=0; i<observers.size();i++){
			Observer observer = observers.get(i);
			observer.update(temparature, humidity, pressure);
		}
	}
	
	public void measurementsChanged(){
		notifyObservers();
	}
	
	public void setMeasurements(float temparature,float humidity,float pressure){
		
		this.temparature = temparature;
		this.humidity = humidity;
		this.pressure = pressure;
		measurementsChanged();
	}

}
